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Proceedings Paper

Development of lightweight x-ray mirrors for the Constellation-X mission
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Paper Abstract

Constellation-X is NASA's next major X-ray astronomical observatory. Its salient features are its very large effective X-ray collecting area (about 30,000 cm2 at 1 keV) and high resolution gratings and cryogenic detector systems. The large mirror effective area presents unique and unprecedented challenges in optical fabrication and metrology. In this paper we report on the development of very lightweight X-ray mirrors that address these challenges. We use a two-step mirror fabrication process: (1) slumping thin (0.4mm) flat glass sheets to generate high quality substrates that may have mid-frequency figure errors, and (2) reducing or eliminating the mid-frequency errors using an epoxy replication process. We discuss problems and the potential associated with each of these two steps. Based on our work to date, we expect that this technology to be able to meet the baseline Constellation-X requirements, i.e, 15" HPD (half-power diameter) at the observatory level. In the next few years, we will further advance this technology and expect it to reach the Constellation-X goal: 5" HPD at the observatory level.

Paper Details

Date Published: 11 October 2004
PDF: 9 pages
Proc. SPIE 5488, UV and Gamma-Ray Space Telescope Systems, (11 October 2004); doi: 10.1117/12.552250
Show Author Affiliations
William W. Zhang, NASA Goddard Space Flight Ctr. (United States)
David A. Content, NASA Goddard Space Flight Ctr. (United States)
Stephen J. Henderson, NASA Goddard Space Flight Ctr. (United States)
John Philip Lehan, NASA Goddard Space Flight Ctr. (United States)
Robert Petre, NASA Goddard Space Flight Ctr. (United States)
Timo T. Saha, NASA Goddard Space Flight Ctr. (United States)
Stephen L. O'Dell, NASA Marshall Space Flight Ctr. (United States)
William D. Jones, NASA Marshall Space Flight Ctr. (United States)
William A. Podgorski, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Paul B. Reid, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 5488:
UV and Gamma-Ray Space Telescope Systems
Guenther Hasinger; Martin J. L. Turner, Editor(s)

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